The problem with French troops in 1940 is the same problem our troops had in Vietnam-bad leaders.
One design feature of the MAS 1936 is the rear sight has no windage adjustements, they were made by installing a new peep sight with the correct amount of offset. The screws on the front band require a special screwdriver, it's fairly easy to make your own.
Neither the Lebel nor the Mannlicher-Berthier which preceded the M1936 in French service had safeties, the version I read said they thought safeties led to a false sense of security.